<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=655877
-->
<head>
  <meta charset=UTF-8>
  <title>Test for Bug 655877</title>
  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=655877">Mozilla Bug 655877</a>
<p id="display"></p>
<div id="content">
  <svg width="400" height="200">
    <text x="100" y="100" style="font: 16px sans-serif">
      abc אבג 123 דהו defg
    </text>
  </svg>
</div>

<pre id="test">
<script class="testbody" type="application/javascript">
SimpleTest.waitForExplicitFinish();

function close(x, y, message) {
  ok(Math.abs(x - y) < 1e-4, message);
}

function runTest() {
  var text = document.querySelector("text");

  // there are only 20 addressable characters
  is(text.getNumberOfChars(), 20, "getNumberOfChars");

  var sum, total = text.getComputedTextLength();

  close(text.getSubStringLength(0, 20), total, "getSubStringLength all");

  // add the advance of each glyph
  sum = 0;
  for (var i = 0; i < 20; i++) {
    sum += text.getSubStringLength(i, 1);
  }
  close(total, sum, "sum getSubStringLength 1");

  // split the text up into three chunks and add them together
  close(total, text.getSubStringLength(0, 6) +
               text.getSubStringLength(6, 8) +
               text.getSubStringLength(14, 6), "sum getSubStringLength 2");

  SimpleTest.finish();
}

window.addEventListener("load", runTest, false);
</script>
</pre>
</body>
</html>
